MACROMEDIA FLEX BUILDER-USING FLEX BUILDER Use Manual page 137

HTTP Service
Remote Object
After clicking one of the items, a dialog box appears to let you specify the web service, HTTP
service, or Java object you want to use.
If you selected Web Service, select a named service from the pop-up menu or enter the URL of
3.
a web service's WSDL file in the text box.
For more information, click the Help button on the dialog box.
If you selected HTTP Service, select a named service from the pop-up menu or enter the address
4.
of an HTTP data source in the text box.
For more information, click the Help button on the dialog box.
If you selected Remote Object, select a named service from the pop-up menu or enter the
5.
location of the Java object or Flash Remoting service in the text box.
For more information, click the Help button on the dialog box.
After closing the dialog box, the web service, HTTP service, or remote object appears in the Data
panel indicating that a reference to it has been inserted into the MXML file and that you can bind
it to a component or a data model in the file.
A Flex web service is easier to use than the other Flex data services because you can visually bind
to the web service's results or parameters without knowing them in advance—Flex Builder
retrieves and displays the schema for you. Flex Builder does not retrieve and display the schema of
HTTP services and remote objects. You must know the schema of these objects in advance to
recreate it in your code (for visual binding), or to write the binding expression yourself.
Related topics
•
"Working with Flex data services" on page 136
Binding a Flex data service to an object
After inserting a Flex data service in the MXML file, you can bind it to a property of a component
or data model in the file.
You must create one binding to retrieve data from the data service and a separate binding to pass
data to the data service. In either case, you must create an event handler to call the data service.
This section covers the following topics:
•
"Retrieving data from a Flex data service" on page 137
•
"Passing data to a Flex data service" on page 139
•
"Calling the data service" on page 141
Retrieving data from a Flex data service
You can create bindings that retrieve data from Flex data services. For example, you can create a
binding that retrieves weather information from a web service so that you can display it in your
MXML file.
inserts a service that lets you retrieve data from an HTTP address.
inserts a service that lets you access the methods of a Java object.
Working with Flex data services 137